CVE-2026-81650Network attack vectorHinoki check available

Code execution via faulty ZIP extension validation

Published Sep 20, 2026 · Updated Sep 20, 2026

Unrestricted file upload in NextGEN Gallery before 4.5.0 allows remote authenticated users to write files through ZIP import. The archive extraction loop reuses the extension variable as its counter, causing every extracted file's extension check to pass. An account granted gallery-management capability is required, and code execution occurs only where the web-accessible destination executes the uploaded file type.

CVSS severityUnavailable
Unscored
EPSS probability0.50%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Unrestricted file upload in NextGEN Gallery before 4.5.0 allows remote authenticated users to write files through ZIP import. The archive extraction loop reuses the extension variable as its counter, causing every extracted file's extension check to pass. An account granted gallery-management capability is required, and code execution occurs only where the web-accessible destination executes the uploaded file type.

The record

CVE
CVE-2026-81650
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
Sandhills Development, LLC
Product
NextGEN Gallery
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sandhills Development, LLC · NextGEN Galleryversion=0 <4.5.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started